Download LANDMARKS OF MODERN BIOLOGY

FIRST SEMESTER B.Sc. ZOOLOGY
LANDMARKS OF MODERN BIOLOGY
Seventeenth Century
1628 - William Harvey publishes An Anatomical Exercise on the Motion of the Heart
and Blood in Animals.
1640 - Jan Baptist van Helmont performs his famous tree plant experiment in which
he shows that the substance of a plant derives from water and air, the first description
of photosynthesis.
1651 - William Harvey concludes that all animals, including mammals, develop from
eggs.
1663 - Robert Hooke sees cells in cork using a microscope.
1673 - Anton Leeuwenhoek describes microscopic life.
1682 – Nehemiah Grew establishes plant physiology.
1683 - Anton van Leeuwenhoek observes bacteria.
1694 - German botanist Rudolph Camerarius conclusively demonstrates the sexuality
of flowering plants and sets the stage for the first agricultural revolution.
Eighteenth Century
1735 – Carlos Linnaeus begins the modern description of life
1771 - Joseph Priestley demonstrates that plants produce a gas that animals and
flames consume. Those two gases are carbon dioxide and oxygen.
1796 – Baron Cuvier founds the science of comparative anatomy.
Nineteenth Century
1800 - The term biology in its modern sense is coined by Karl Friedrich Burdach
1802 – The Term biology is used independently by Gottfried Reinhold Treviranus Jean
Baptiste Lamarck.
1809 – Jean Baptiste Lamarck proposes a modern theory of evolution based on the
inheritance of acquired characteristics.
1817 - Pierre-Joseph Pelletier and Joseph-Bienaime Caventou isolate chlorophyll.
1826 - Karl von Baer shows that all animal life begins with an egg.
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1838 - Matthias Schleiden proposes that all plants are composed of cells.
1839 - Theodor Schwann proposes that all animal tissues are composed of cells.
1856 - Louis Pasteur states that microorganisms produce fermentation.
1859 - Charles Darwin proposes his theory of biological evolution by means ofnatural
selection.
1858 - Rudolf Virchow proposes that cells can only arise from pre-existing cells;
1864 - Louis Pasteur disproves the spontaneous generation of cellular life.
1866 - Gregor Mendel formulates his Laws of Inheritance.
1869 - Friedrich Miescher discovers nucleic acids in the nuclei of cells.
1876 - Oskar Hertwig and Hermann Fol independently describe the entry of sperm
into the egg and the subsequent fusion of the egg and sperm nuclei to form a single
new nucleus.
1878 – Louis Pasteur proves germ theory of disease.
1884 - Walther Fleming coins the term mitosis to describe mitosis.
1884 - Edward Strasbourg coins the term cytoplasm to describe the cell’s central fluid
and establishes the cell’s structure.
1886- Scientists explain the nitrogen-fixing of the pea family
1898 - Martinus Beijerinck uses filtering experiments to show that tobacco mosaic
disease is caused by something smaller than a bacterium, which he names a virus.
Twentieth Century
1902 - Walter Sutton and Theodor Boveri, independently propose that the
chromosomes carry the hereditary information.
1905 - William Bateson coins the term "genetics" to describe the study of biological
inheritance.
1905 – Scientists discover how specialized sex cells come about and describe meiosis.
1907 - Ivan Pavlov demonstrates conditioned responses with salivating dogs.
1909 - Wilhelm Johannsen coined the word "gene."
1911 - Thomas Hunt Morgan proposes that genes are arranged in a line on the
chromosomes.
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1920 - Nikolay Vavilov establishes the Earth’s biomes
1927 - Austrian zoologist Karl von Frisch publishes Dancing Bees.
1928 - Alexander Fleming discovers penicillin.
1928 - Frederic Clements proposes the theory of plant succession.
1929 - Phoebus Levene discovers the sugar deoxyribose in nucleic acids.
1933 - Tadeus Reichstein artificially synthesizes vitamin C; first vitamin synthesis.
1937 - Konrad Lorenz describes the imprinting behavior of young birds.
1944 - Oswald Avery shows that DNA carries the genetic code in pneumococcus
bacteria.
1946 - American chemist Melvin Calvin explains photosynthesis.
1949 – Aldo Leopold’s book A Sand County Almanac becomes the inspiration for the
environmental movement
1952 - Alfred Hershey and Martha Chase show that DNA is the genetic material in
bacteriophage viruses.
1952 - Rosalind Franklin concludes that DNA is a double helix
1953 - After examining Franklin's unpublished data, James D. Watson and Francis
Crick publish a double-helix structure for DNA.
1953 - Eugene P. Odum publishes the first textbook in the field: Fundamentals of
Ecology and puts environmental studies on a scientific basis.
1955 - Marianne Grunberg-Manago and Severo Ochoa discover the first nucleic-acid
synthesizing enzyme (polynucleotide phosphorylase), which links nucleotides together
into polynucleotides.
1955 - Arthur Kornberg discovers DNA polymerase enzymes.
1957 – Ecology's concept of niche is defined by G.E. Hutchinson.
1960 - Robert Woodward synthesizes chlorophyll.
1963 - Nikolaas Tinbergen lays out the four whys of animal behavior
1967 - American biologist Lynn Margulis describes the symbiotic cell and how
cooperation is one of the bases for all life on the planet.
1969 - American ecologist Robert Whittaker proposes five kingdoms of life.
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1972 - Stephen Jay Gould and Niles Eldredge propose an idea of evolution they call
"punctuated equilibrium.”
1979 – James Lovelock proposes Gaia Hypothesis.
1986 – E.O. Wilson coins the term biodiversity.
1995 - Publication of the first complete genome of a free-living organism.
1996 - Dolly the sheep is first clone of an adult mammal.
1998 - Jack Bradbury and Sandra Vehrencamp published their Principles of Animal
Communication
Twenty First Century
2001 - Publication of the first drafts of the complete human genome.
2002 - First virus produced 'from scratch,' an artificial polio virus that paralyzes and
kills
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